INSTRUMENTATION

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INSTRUMENTATION

• DMPS
• DIFFERENTIAL MOBITY PARTICLE SIZER
• H-TDMA
• HYGRSCOPIC TANDEM DMA
• CCN COUNTER
• CLOUD CONDENSATION NUCLEI COUNTER

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New Lund H-TDMA now under construction

• Active temperature control on both DMAs
  (excellent RH stability)
• Closed-loop sheath air on both DMAs (no
  compressor needed)
• Scanning DMA2 voltage, not stepping (better time
  resolution)

CPC
CPC
DMA1 box
DMA2 box
DMA2 box
DMA1 driers
Front view
Side view
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TDMA systems on ASCOS 2008

• H-TDMA (Hygroscopicity, Lund Univ.)
• UFO-TDMA (Ultrafine Organic, Kuopio Univ.)
• V-TDMA (Volatility, IFT Leipzig)
• VH-TDMA (Volatility Hygroscopicity,
  Queensland Univ.)

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VH-TDMA

• Look in situ at particle hygroscopicity before
  during and after volatilisation.

humidify
Select Size
Examine size
DTH
GTH DTH/DT
D0
Heat
Examine size
DT
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• LABORATORY OPC Volatility
• Determines size segregated aerosol composition
  and mixing mode.
• 1 Hz, 32 chan, PMS PCASP preceded by 500 W
  heater
• Size range 0.05 lt R lt 5 µm
• Temperature range 70 lt T lt 800 ºC
• Temperature scan duration 15 minutes
• Flow rate 0.12 l/min
• Power 240 VAC

• LABORATORY SMPS Volatility
• Determines size segregated aerosol composition
  and mixing mode.
• 64 chan SMPS, built in house using TSI Long
  column, preceded by 500 W heater.
• Size range 10 lt R lt 240 nm
• Temperature range Laboratory lt T lt 800ºC (user
  defined 50ºC increments)
• Sample flow 1 l/min, Sheath flow 6 10 l/min
• SMPS scan duration 2.5 minutes
• Delay for temperature stabilisation 2 minutes
• Contains AM 241 radiation source

• LABORATORY CPC TSI 3025
• 1 Hz Concentration R gt 3 nm
• Flow rate 1.5 l/min, Power 240 VAC

• HELICOPTER CLASP
• 10 Hz, 16 chan, Optical Particle Counter
• Size range 0.12 lt R lt 9 µm
• Flow rate 3 l/min
• Power 24 VDC
• Coms Protocol RS485
• Size 24 x 8 x 6 cm, 0.5 kg

• LABORATORY OPC PMS PCASP
• 1 Hz, 32 chan, number concentration 0.05 lt R lt
  5 µm
• Flow rate 0.12 l/min, Power 240 VAC

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Ammonium sulphate
Ammonium bisulphate
VOC
?
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Inlet for aerosols and gases

• Helicopter
• Vertical profiling
• Gases (PTR-MS, Univ. Innsbruck)
• Particles (Univ. Lund, Stockholm)

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Aerosol inlet
Gas inlet
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CPC
UCPC
OPC
Pump
Aerosol inlet
Aerosol rack
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AOE-2001 Helicopter Aerosol System Aerosol
Instrumentation Rack
PC
TSI UCPC 3025 Dp gt 3 nm TSI CPC
3760A Dp gt 15 nm CLIMET OPC CI500 Dp
gt 300 nm
CPC
UCPC
OPC
Pump
Aerosol inlet
Isokinetic at 70 km/h
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Time Resolution 1 Hz ?Good Altitude Resolution
Ultrafine Particle Concentrations (Dp lt 15
nm) Flight 23, 8 August 2001, 88.3?N Arctic
Boundary Layer Height at 350 m